A.sometimes
B.all times
C.never
D.partly
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A.automatically suppressed
B.finished by the operator
C.manually suppressed
D.done again
A.DSC
B.EPIRB
C.EGC
D.NBDP
A.Inmarsat SES
B.VHF /DSC or MF/DSC
C.SART and VHF/DSC
D.Satellite EPIRB and VHF /DSC
A.ship in distress and assisting units
B.NCS and RCC
C.RCCs and “on-scene commander” or “coordinator surface search”
D.ship in distress and coast station
A.GMDSS
B.EGC
C.MSI
D.DSC
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The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
Before GMDSS, if the radio officer on board is serious ill,（）.
（）will form the basis for distress alerting and safety calling.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
The priority of EGC messages is classified by（）.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Please use（）for（）.